The Flash Season 5: 5 Most Important Episodes

The Flash: The Complete Fifth Season is out on Blu-ray and DVD today. Wow, what a season it was! You could argue that Season 5 of The Flash took us deeper into The Flash's mythology with Eobard Thawne; deeper into the complicated relationship between Barry and Iris; and deeper into the mythologies of both Vibe and Killer Frost. The whole season was gnarly, painful, complex and, ultimately, heartbreaking.

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Synopsis: Shortly after defeating The Thinker, Barry Allen/The Flash and his wife, Iris, were stunned by the arrival of their already grown, speedster daughter from the future, Nora (Jessica Parker Kennedy). However, acclimating to their lives as parents won’t be the only challenge they face, as Season Five pits Team Flash against Central City’s latest scourge – the DC Super-Villain Cicada (Chris Klein).

#5 Nora

The Season 5 premiere kicks off the entire story arc. As we found out in the Season 4 finale, that awkward girl we kept seeing pop up in Barry's and Iris's life was their daughter from the future, Nora. Her appearance is at once joyous and disconcerting to the West couple. Everyone discusses how to send Nora back safely, without disrupting the timeline, of which Nora doesn't understand that she probably already changed the future. By the end, however, we know that Nora isn't being completely truthful about her visit to the past.

#4 Snow Pack

We've watched Caitlin Snow struggle with not only her relationship with her mother, but also with her relationship with Killer Frost. However, last season, just when she had become besties with Killer Frost, the former villain was knocked out of her system. Or so Caitlin thought. A tearful family reunion, along with a life and death situation, sees the return of more than one character.

#3 Cause and XS

This episode is simply amazing. I'm not giving anything away by saying that something bad happens, and Nora tries over and over to fix it, only to realize that you truly can't mess with the timeline. Watching “Cause and XS,” you'll become as frustrated and defeated as poor Nora. The final twist is simply incredible.

#2 Godspeed

In “Godspeed,” we find out exactly how much Eobard Thawne's actions against Barry have hurt him. Sure, we knew that Thawne destroyed his childhood, but because Barry's a superhero, he rarely let anyone see the complete heartbreak he felt. After Barry finds out someone close to him has betrayed him, his actions prove that he has built strong boundaries in his life to keep anything from hurting him that much ever again.

#1 Legacy

The season finale is, of course, the most important episode of Season 5. The wrap-up to the season's storyline is so heartbreaking you just won't believe it's really happening. The end takes everything that's been built last season and completely blows it up. Plus, “Legacy” masterfully sets up Season 6 because, really, where do we go from here?